Measurement of Weak Forces in Physics Experiments

Braginsky, V. B.; Manukin, A. B.

doi:10.1119/1.11161

Cited by 35 publications

(9 citation statements)

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“…The stationary part (Figure 3 left) can be regarded as a converter from high frequency voltage to slow wave, and it is designed with phase velocity v p | 0.01c and wave impedance Z 0 | 75:. In the experiment, the moving part is assembled as a torsion pendulum [13] so that the possible rotation can be observed and the toque can be estimated when it is in balance after rotating. The voltage-to-wave converter is excited by a high frequency signal generator at the starting port and matched with a 75: load at the end port.…”

Section: Experimental Validationmentioning

confidence: 99%

Analysis on the Conversion Mechanism of Electromagnetic Energy to Continuous Movement

Xia

Song

Wang

2016

MATEC Web of Conferences

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Section: Experimental Validationmentioning

confidence: 99%

Analysis on the Conversion Mechanism of Electromagnetic Energy to Continuous Movement

Xia

Song

Wang

2016

MATEC Web of Conferences

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“…This aspect of optomechanics has been subject to intense research in the past decades and has first been experimentally described in large-scale interferometric gravitational wave experiments [22]. In 1967, Braginsky et al recognized that radiation pressure gives rise to the effect of dynamical backaction [23], laying the foundation for the description of parametric amplification and backaction-cooling [24,25]. A main goal of the field of optomechanics is to observe quantum phenomena in mechanical systems.…”

Section: Concept Of a Cavity Optomechanical Field Sensormentioning

confidence: 99%

Sensitivity and performance of cavity optomechanical field sensors

et al. 2012

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This article describes in detail a technique for modeling cavity optomechanical field sensors. A magnetic or electric field induces a spatially varying stress across the sensor, which then induces a force on mechanical eigenmodes of the system. The force on each oscillator can then be determined from an overlap integral between magnetostrictive stress and the corresponding eigenmode, with the optomechanical coupling strength determining the ultimate resolution with which this force can be detected. Furthermore, an optomechanical magnetic field sensor is compared to other magnetic field sensors in terms of sensitivity and potential for miniaturization. It is shown that an optomechanical sensor can potentially outperform state-of-the-art magnetometers of similar size, in particular other sensors based on a magnetostrictive mechanism.

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“…On the other hand, there exists an alternative and complementary force-enhancement mechanism that can play a role at large separations: light normally incident on two separated planar objects can be resonantly enhanced due to the Fabry-Perot cavity formed between the objects by reflections from adjacent surfaces of the objects, and the extent of this enhancement will increase with the reflectivity of the objects (i.e. with the Q of the [20,74,[87][88][89][90], in applications ranging from gravitational-wave detection [91] to optical cooling [42,[92][93][94][95], it is interesting to explicitly compare the two resonant mechanisms. In this section, we briefly consider the kinds of repulsive and attractive forces that can arise in systems consisting of unpatterned multilayer objects, emphasizing some of their similarities and differences compared to forces arising from evanescently coupled resonances.…”

Section: Fabry-perot Forcesmentioning

confidence: 99%

Bonding, antibonding and tunable optical forces in asymmetric membranes

Rodríguez¹,

McCauley²,

Hui³

et al. 2011

Opt. Express

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We demonstrate that tunable attractive (bonding) and repulsive (anti-bonding) forces can arise in highly asymmetric structures coupled to external radiation, a consequence of the bonding/anti-bonding level repulsion of guided-wave resonances that was first predicted in symmetric systems. Our focus is a geometry consisting of a photonic-crystal (holey) membrane suspended above an unpatterned layered substrate, supporting planar waveguide modes that can couple via the periodic modulation of the holey membrane. Asymmetric geometries have a clear advantage in ease of fabrication and experimental characterization compared to symmetric double-membrane structures. We show that the asymmetry can also lead to unusual behavior in the force magnitudes of a bonding/antibonding pair as the membrane separation changes, including nonmonotonic dependences on the separation. We propose a computational method that obtains the entire force spectrum via a single time-domain simulation, by Fourier-transforming the response to a short pulse and thereby obtaining the frequency-dependent stress tensor. We point out that by operating with two, instead of a single frequency, these evanescent forces can be exploited to tune the spring constant of the membrane without changing its equilibrium separation

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Measurement of Weak Forces in Physics Experiments

Cited by 35 publications

References 0 publications

Analysis on the Conversion Mechanism of Electromagnetic Energy to Continuous Movement

Analysis on the Conversion Mechanism of Electromagnetic Energy to Continuous Movement

Sensitivity and performance of cavity optomechanical field sensors

Bonding, antibonding and tunable optical forces in asymmetric membranes

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